Simulative electronic blood pressure meter

ABSTRACT

Simulative electronic blood pressure meter in which by means of internal program, a central processor/controller converts and outputs the sensed blood pressure signal to a liquid crystal display to show a column-type indication simulating the mercury column of a traditional blood pressure meter. A digital counting circuit is combined, whereby when simulating the mercury column, an auxiliary display of digital change is provided for the user to easily know the value. The central processor/controller cooperates with a sound emitting unit which synchronously emits a sound simulating the sensed pulse from the start to the end. The volume of the emitted sound is varied with the strength of the pulse. The electronic blood pressure meter is used in a state like the mercury column-type blood pressure meter for a user to more accurately and lively judge the measured value.

BACKGROUND OF THE INVENTION

[0001] The present invention is related to a simulative electronic bloodpressure meter which displays a column-type indication on a liquidcrystal display to simulate the going up and down of the mercury columnof a traditional blood pressure meter. A sound emitting unit is combinedto synchronously emit a sound simulating the sensed pulse for a user tomore accurately and lively judge the measured value.

[0002] Various kinds of electronic blood pressure meters have beendeveloped. However, the conventional mercury column-type blood pressuremeters are still widely used by doctors and nurses. This is because thatthe data measured by the electronic blood pressure meters often haveerrors due to various kinds of factors. Moreover, the electronic bloodpressure meters can only show the measured value at the end of themeasurement and fail to lively and accurately continuously indicate thevalue of the measured blood pressure during the entire measurement.Therefore, a user can hardly truly judge the measured value.

SUMMARY OF THE INVENTION

[0003] It is therefore a primary object of the present invention toprovide a simulative electronic blood pressure meter which is able todisplay a column-type indication simulating the mercury column of atraditional blood pressure meter. A digital counting circuit iscombined, whereby when simulating the mercury column, the digital changeis also shown. The central processor/controller cooperates with a soundemitting unit which synchronously emits a sound simulating the sensedpulse. The volume of the emitted sound is varied with the strength ofthe pulse. The electronic blood pressure meter is used in a state likethe mercury column-type blood pressure meter for a user to moreaccurately and lively judge the value of the blood pressure.

[0004] The present invention can be best understood through thefollowing description and accompanying drawings wherein:

BRIEF DESCRIPTION OF THE DRAWINGS

[0005]FIG. 1 is a circuit diagram of the present invention;

[0006]FIG. 2 is a flow chart of the circuit of the present invention;

[0007]FIG. 3 is a perspective view of an embodiment of the presentinvention; and

[0008]FIG. 4 is a view of the liquid crystal display of an embodiment ofthe present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Please refer to FIG. 1. The simulative electronic blood pressuremeter of the present invention includes a central processor/controller13, a stabilizing circuit 12, a pressure sensor 14, an amplifier 19, arectifying circuit 20, a switch keyboard 16, an electric valve 22, adisplay 23 and a sound emitting unit 24 which are interconnected. Thecentral processor/controller 13 serves to open/close or analyze/processthe respective units connected therewith. The stabilizing circuit 12 isconnected with a cell 11 for stabilizing the power released from thecell and supplying the power to the respective circuits. The pressuresensor 14 is mounted on an inflatable envelope 18 (with reference toFIGS. 2 and 3) for sensing the pressure change of the measured objectand inputting the pressure change into the amplifier 19. The amplifier19 cooperates with the rectifying circuit 20 for amplifying andconverting the pressure change into digital signal and transmitting thedigital signal to the central processor/controller 13 for analysis andoperation. A user operates the switch keyboard 16 to turn on/off thecentral processor/controller 13 or select operation options. Theelectric valve 22 is controlled by the central processor/controller 13to deflate the inflatable envelope 18. The display 23 converts anddisplays the signal transmitted by the central processor/controller 13.The sound emitting unit 24 is controlled by the centralprocessor/controller 13 to emit specific sound. Referring to FIG. 2, thecell 11 supplies power for the entire structure and circuit of thepresent invention. The stabilizing circuit 12 modulates the inputvoltage into a stable voltage source and respectively transmits thepower to the central processor/controller 13, the pressure sensor 14 andan intake pump 15. According to the function signal indication of theswitch keyboard 16, the central processor/controller 13 transmitsturning on/off signal to the intake pump 15 to inflate or not to inflatethe inflatable envelope 18. The intake pump 15 via an air pressure hose17 conducts the air into a pressurizing unit surrounding the pulsemeasuring section such as an inflatable envelope 18. The inflatableenvelope 18 is inflated until it has a fully binding pressure. At thistime, the pressure sensor 14 senses the pressurized state of theinflatable envelope 18 and also senses the pulse and reactive pressureof the vessel of the bound part of the user and thus takes and transmitsthe pressure signal to the amplifier 19. The pressure signal isconverted into current wave pattern which is rectified by the rectifyingcircuit 20 and transmitted to the central processor/controller 13 foranalysis and processing. In the case that the expansion pressure of theinflatable envelope 18 suppresses the vessel from producing any pulseand the pressure sensor 14 cannot sense the pulse of the vessel of thebound part, the central processor/controller 13 will send out acontrolling signal to the intake pump 15 to stop taking in the air.Thereafter, a constant speed exhaust valve 21 continuously exhausts theair at a constant speed of little amount, whereby the air pressure inthe inflatable envelope 18 is gradually relieved. When the pressure isweakened to such a value that the pressure sensor 14 can sense that theblood in the vessel starts pulses, the pressure is gradually reduced andthe pulse pressure of the blood produces pushing and squeezing action.At this time, the pressure sensor 14 can continuously sense the changeof the blood pressure value change until it is unable to further senseany pulse. That is, the inflatable envelope 18 is relieved to such anextent that it cannot sense the pulse of the measured part. At thistime, the measurement is completed and the central processor/controller13 sends out a releasing signal to the electric valve 22 to control andperform fast deflation of the inflatable envelope 18. Furthermore, theblood pressure detected by the central processor/controller 13 iscontinuously transmitted to a liquid crystal display 23 for displaying.Referring to FIG. 4, by means of the internal program of the centralprocessor/controller 13, the signal is converted and output to thedisplay 23 to show a column-type indication simulating the mercurycolumn of the mercury column of the traditional blood pressure meter. Inaddition, a digital counting circuit is combined, whereby whensimulating the mercury column, an auxiliary display of data change isprovided for the user to easily know the value. Also, the centralprocessor/controller 13 controls a preset sound emitting unit 24. Thesound emitting unit 24 synchronously emits a sound simulating the sensedpulse from the start to the end, the volume of the emitted sound isvaried with the strength of the pulse. With the sound, the user can moreaccurately and easily judge the measured value.

[0010] The above embodiments are only used to illustrate the presentinvention, not intended to limit the scope thereof. Many modificationsof the above embodiments can be made without departing from the spiritof the present invention.

What is claimed is:
 1. Simulative electronic blood pressure metercomprising a central processor/controller, a pressure sensor, an intakepump, a switch keyboard, a pressurizing unit and a display, by means ofinternal program, via the switch keyboard, the centralprocessor/controller controlling the intake pump to pressurize thepressurizing unit, the pressure sensor sensing the blood pressure signalfrom the pressurizing unit and outputting the signal to the centralprocessor/controller for conversion and processing, the signal beingthen output to the display to show a column-type indication simulatingthe mercury column of a traditional blood pressure meter, a digitalcounting circuit being combined, whereby when simulating the mercurycolumn, an auxiliary display of digital change is provided for the userto easily know the value.
 2. Simulative electronic blood pressure meteras claimed in claim 1, wherein the central processor/controllercooperates with a sound emitting unit which emits a sound simulating thesensed pulse from the start to the end, the volume of the emitted soundbeing varied with the strength of the pulse.
 3. Simulative electronicblood pressure meter as claimed in claim 1, wherein a cell is providedas a power supply, the power being modulated by a stabilizing circuitinto a necessary stable voltage source which is distributed torespective parts.
 4. Simulative electronic blood pressure meter asclaimed in claim 2, wherein a cell is provided as a power supply, thepower being modulated by a stabilizing circuit into a necessary stablevoltage source which is distributed to respective parts.
 5. Simulativeelectronic blood pressure meter as claimed in claim 1, wherein thepressure sensor senses the pulse of the vessel under the pressure of thepressurizing unit, the signal being processed and converted by anamplifier into an electric wave pattern, the wave being rectified by arectifying circuit and then transmitted to the centralprocessor/controller for processing and controlling.
 6. Simulativeelectronic blood pressure meter as claimed in claim 2, wherein thepressure sensor senses the pulse of the vessel under the pressure of thepressurizing unit, the signal being processed and converted by anamplifier into an electric wave pattern, the wave being rectified by arectifying circuit and then transmitted to the centralprocessor/controller for processing and controlling.
 7. Simulativeelectronic blood pressure meter as claimed in claim 1, wherein when thepressure sensors is unable to sense the pulse of the measured part, thecentral processor/controller sends out a signal for controlling andopening an electric valve to fast exhaust the air.
 8. Simulativeelectronic blood pressure meter as claimed in claim 2, wherein when thepressure sensors is unable to sense the pulse of the measured part, thecentral processor/controller sends out a signal for controlling andopening an electric valve to fast exhaust the air.